<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>


<script>
    // 定义json
    var json = {
        "name":"zhansan",
        "age":23,
        "addr":["北京","上海","西安"]
    }

    //  获取值
    alert(json.name);

</script>

</body>
</html>